This procedure covers the removal and replacement of the AC accumulator (receiver-drier) on a 2019-2024 Toyota RAV4 with the 2.5L I4 gas engine, including recovery and recharge of the refrigerant system.

Warnings

Tools required

Parts

• AC accumulator/receiver-drier × 1 — 88719-42010 or equivalent
• AC line O-rings × 4 — Use OEM specification
• PAG oil (ND-11 or equivalent) × 1 — Use OEM specification
• R-134a refrigerant × 1 — Typically 17-19 oz total system capacity

Preparation

1. Ensure engine is cold before beginning work
2. Park vehicle on level surface and engage parking brake
3. Raise and secure front of vehicle on jack stands if additional underside access is needed
4. Locate the AC accumulator on the passenger side firewall area, below the cowl panel
5. Have AC refrigerant recovery machine ready and connected

Procedure

1. 1

   Recover AC refrigerant
   Connect AC recovery machine to the service ports. Recover all refrigerant from the system according to machine instructions. Record the amount of refrigerant and oil removed for proper refill quantities. Ensure recovery is complete before proceeding.
   ⚠️Only certified technicians with proper equipment should perform refrigerant recovery. Improper handling violates federal regulations.
2. 2

   Remove cowl panel (if necessary)
   Depending on access requirements, remove the passenger side cowl panel by removing the plastic clips and screws. This provides better access to the accumulator mounting area. Set cowl panel aside in a safe location.
3. 3

   Disconnect inlet line from accumulator
   Using a flare nut wrench, carefully loosen and disconnect the inlet AC line fitting from the top of the accumulator. Have a drip pan ready to catch any residual oil. Cap or plug the open line immediately to prevent moisture ingress and contamination.
   ⚠Use a flare nut wrench to prevent rounding off the soft aluminum fittings. Do not use standard open-end wrenches.
4. 4

   Disconnect outlet line from accumulator
   Using a flare nut wrench, disconnect the outlet AC line fitting from the bottom or side of the accumulator (depending on configuration). Cap or plug this line immediately as well. Inspect O-rings on both fittings and discard.
5. 5

   Remove accumulator mounting bracket
   Remove the mounting bolt(s) securing the accumulator bracket to the body or firewall using a 10mm or 12mm socket. The accumulator is typically held by a single clamp-style bracket. Support the accumulator while removing the final fastener.
   Torque spec

   Mounting Bolts27 Nm (20 lb-ft)
6. 6

   Remove accumulator
   Carefully remove the accumulator from its mounting location. Keep it upright and drain any remaining oil into a graduated container. Measure and record the oil quantity to ensure proper replacement amount in the new accumulator.
7. 7

   Prepare new accumulator
   Remove the new accumulator from packaging. Add the appropriate amount of fresh PAG oil (ND-11 or equivalent) to the new accumulator - typically the same amount drained plus 1-2 oz to account for oil retained in other components. Remove protective caps from the inlet and outlet ports just before installation.
   ⚠Do not leave the new accumulator uncapped for more than a few minutes. The desiccant inside will absorb atmospheric moisture and become saturated.
8. 8

   Install new accumulator
   Position the new accumulator into the mounting bracket location, ensuring proper orientation with inlet and outlet ports aligned to their respective lines. Install the mounting bracket and bolt, tightening to specification.
   Torque spec

   Mounting Bolts27 Nm (20 lb-ft)
9. 9

   Install new O-rings and connect inlet line
   Install new O-rings onto the inlet line fitting after lightly coating them with fresh PAG oil. Remove the cap from the accumulator inlet port and connect the inlet line. Hand-tighten first, then torque to specification using a flare nut wrench and torque wrench.
   ℹ️Lubricate O-rings with PAG oil before installation to prevent tearing and ensure proper seal.
   Torque spec

   AC Line Fittings20 Nm (15 lb-ft)
10. 10

    Install new O-rings and connect outlet line
    Install new O-rings onto the outlet line fitting after coating with PAG oil. Remove the cap from the accumulator outlet port and connect the outlet line. Hand-tighten first, then torque to specification using a flare nut wrench and torque wrench.
    Torque spec

    AC Line Fittings20 Nm (15 lb-ft)
11. 11

    Reinstall cowl panel
    If the cowl panel was removed, reinstall it by aligning the clips and securing all fasteners. Ensure no wiring or hoses are pinched during installation.
12. 12

    Evacuate AC system
    Connect the AC recovery/evacuation machine to the service ports. Evacuate the system to pull a vacuum of at least 29 inHg for a minimum of 30-45 minutes. Monitor for vacuum decay - the system should hold vacuum, indicating no leaks are present.
    ⚠Proper evacuation is critical to remove all moisture from the system. Insufficient evacuation time will lead to poor AC performance and potential compressor damage.
13. 13

    Recharge AC system
    With the system still under vacuum, recharge with the proper amount of R-134a refrigerant (typically 17-19 oz for this system - verify exact amount on underhood label). Add refrigerant according to machine instructions and factory specifications. Do not overcharge.

Reassembly

1. Verify all AC line fittings are torqued to specification and show no signs of refrigerant oil leakage
2. Ensure cowl panel and any removed trim pieces are properly secured
3. Double-check that no tools or parts were left in the engine bay

Verification

• Start the engine and turn AC to maximum cold with fan on high
• Allow system to run for 5-10 minutes and verify cold air output from vents
• Use a digital thermometer to measure vent temperature - should reach 40-50°F depending on ambient conditions
• Use a refrigerant leak detector around all fittings to verify no leaks are present
• Monitor AC system operation over the next several days to ensure proper function and no gradual pressure loss
• Verify AC compressor cycles on and off normally and system pressures are within specification (typically 25-35 psi low side, 200-250 psi high side at idle with 80°F ambient)

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